order: Fix interpreting some external modules being interpreted as internal modules

Fixes import-js#793.

Author: ephys

Diff for: CHANGELOG.md

@@ -6,6 +6,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 ## [Unreleased]
 
 - Add [`group-exports`] rule: style-guide rule to report use of multiple named exports ([#721], thanks [@robertrossmann])
+- [`order`]: Fix interpreting some external modules being interpreted as internal modules ([#793], [#794] thanks [@ephys])
 
 ## [2.8.0] - 2017-10-18
 ### Added
@@ -443,6 +444,7 @@ for info on changes for earlier releases.
 [#858]: https://github.com/benmosher/eslint-plugin-import/pull/858
 [#843]: https://github.com/benmosher/eslint-plugin-import/pull/843
 [#871]: https://github.com/benmosher/eslint-plugin-import/pull/871
+[#794]: https://github.com/benmosher/eslint-plugin-import/pull/794
 [#744]: https://github.com/benmosher/eslint-plugin-import/pull/744
 [#742]: https://github.com/benmosher/eslint-plugin-import/pull/742
 [#737]: https://github.com/benmosher/eslint-plugin-import/pull/737
@@ -514,6 +516,7 @@ for info on changes for earlier releases.
 [#720]: https://github.com/benmosher/eslint-plugin-import/issues/720
 [#686]: https://github.com/benmosher/eslint-plugin-import/issues/686
 [#671]: https://github.com/benmosher/eslint-plugin-import/issues/671
+[#793]: https://github.com/benmosher/eslint-plugin-import/issues/793
 [#660]: https://github.com/benmosher/eslint-plugin-import/issues/660
 [#653]: https://github.com/benmosher/eslint-plugin-import/issues/653
 [#627]: https://github.com/benmosher/eslint-plugin-import/issues/627
@@ -670,3 +673,4 @@ for info on changes for earlier releases.
 [@rosswarren]: https://github.com/rosswarren
 [@alexgorbatchev]: https://github.com/alexgorbatchev
 [@robertrossmann]: https://github.com/robertrossmann
+[@ephys]: https://github.com/ephys

Diff for: package.json

@@ -60,6 +60,7 @@
     "eslint-import-resolver-node": "file:./resolvers/node",
     "eslint-import-resolver-webpack": "file:./resolvers/webpack",
     "eslint-module-utils": "file:./utils",
+    "eslint-import-test-order-redirect": "file:./tests/files/order-redirect",
     "eslint-plugin-import": "2.x",
     "eslint-plugin-typescript": "^0.8.1",
     "gulp": "^3.9.0",

Diff for: src/core/importType.js

@@ -29,7 +29,11 @@ export function isBuiltIn(name, settings) {
 
 function isExternalPath(path, name, settings) {
   const folders = (settings && settings['import/external-module-folders']) || ['node_modules']
-  return !path || folders.some(folder => -1 < path.indexOf(join(folder, name)))
+
+  // extract the part before the first / (redux-saga/effects => redux-saga)
+  const packageName = name.match(/([^\/]+)/)[0]
+
+  return !path || folders.some(folder => -1 < path.indexOf(join(folder, packageName)))
 }
 
 const externalModuleRegExp = /^\w/

Diff for: tests/files/order-redirect/module/package.json

@@ -0,0 +1,5 @@
+{
+  "name": "order-redirect-module",
+  "private": true,
+  "main": "../other-module/file.js"
+}

Diff for: tests/files/order-redirect/other-module/file.js

@@ -0,0 +1,5 @@
+{
+  "name": "eslint-import-test-order-redirect",
+  "version": "1.0.0",
+  "private": true
+}

Diff for: tests/files/order-redirect/package.json

@@ -29,6 +29,12 @@ ruleTester.run('order', rule, {
         import sibling, {foo3} from './foo';
         import index from './';`,
       }),
+    // Importing a package which contains nothing but a package.json which resolves elsewhere
+    test({
+      code: `
+        import reduxSagaEffects from 'eslint-import-test-order-redirect/module';
+        import relParent1 from '../foo';`,
+    }),
     // Multiple module of the same rank next to each other
     test({
       code: `